Pumping pendulum



May 16, 1939. B. H. RAVANELLI PUMPING PENDULUM Filed Sept. 25, 1937 3 Sheets-Sheet l INVENTORS EsW/VETTH 1'34 Vfl/VELLA WATTORNEYS May 16, 1939. B. H. RAVANELLI PUMPING PENDULUM Filed Sept. 23, 1937 3 Sheets-Sheet 2 4L ATTORNEYS May 16, 1939. a. H. RAVANELLI PUMPING PENDULUM Filed Sept. 23, 1957 3 Sheets-Sheet 3 I N VEN TORS b U ATTORNEYS Patented May 16, 1939 UNITED STATES PATENT OFFICE PUMPING PENDULUM Application September 23, 1937, Serial No. 165,399

2 Claims.

My invention relates to a pumping pendulum such as is used for actuating pumping rods extending to oil Wells and serving to reciprocate the pumping rod.

Pumping pendulums of the above type as heretofore constructed have consisted of a framework from which the pendulum was suspended in such a manner as to swing back and forth under any suitable motive means and transmission such as a crank and connecting rod and having connectors at its lower end to which the ends of pumping rods could be screwed in. In order to disconnect a pumping line from a pendulum of the above type it was generally necessary to stop the pendulum before a pumping line could be disconnected.

My present invention overcomes the above disadvantages and provides a pumping pendulum from which the pumping lines can be easily and quickly disconnected while the pendulum is in motion.

In my invention the pumping pendulum is suspended in any suitable manner from a supporting frame or structure and is provided at its lower ends with hooks or loops which engage with loops on the end of pumping lines. The pendulum may be swung in opposite directions by any suitable power through a crank and connecting rod. To disengage the pumping line a loop pivotally connected to the supporting frame is swung upwardly to engage and hold the end of the pumping line before the pendulum has reached the end of its swing, so that upon swinging further it is free from the loop of the pumping line and 5 the latter falls freely out of the path of the pendulum hook. Either of two pumping lines may be disconnected from the pendulum in this manner while the other is attached in operative position.

40 The various features of the invention are illustrated by way of example in the accompanying drawings in which- Fig. 1 is a side elevation of a pumping pendulum embodying a preferred form the invention;

45 Fig. 2 is a front elevation taken from the right of Fig. 1; Figs. 3 and 4 are detailed side elevational views of the disengaging loop showing respectively the position at which it engages and holds the pumping line and the position to which 50 it falls when free from engagement with the pendulum.

In the specific embodiment of the invention shown in the accompanying drawings, a swinging pendulum I I] is supported from a frame I I which 55 may consist of two pairs of leg elements I2 and I3 at each side of the pendulum I0, the legs of each pair extending toward an apex at which they are joined to the legs of the other pair by a top cross piece I4. The legs I2 and I3 and the cross piece I4 may all be m'ade of structural metal as, for example, of steel tubes or pipe. The leg elements I2 and I3 of the frame may be braced by connecting elements I5 and I 6. The pendulum Ill may be suspended from the cross piece I4 by means of bearings I'I, one at each side of the 1 0 pendulum and secured to a cross piece I4 by means of U-bolts I8 which engage ears I9 on the bearings II. The bearings I'I support ashaft 20 to which the upper end of the pendulum I0 is secured. The pendulum I0 may be of any suitable 5 construction as, for example, an I-beam.

The pendulum III is swung back and forth by ineans of a crank 2I which is connected to a bracket 22 at the lower end of the pendulum. II) by means of a connecting rod 23. The bracket 20 22 may be adjusted vertically on the pendulum I0 to vary the swing of the latter.

A double hook is secured to the lower end of the pendulum I0 having hook elements 24 and 25 on opposite sides. These hook elements 24 and 25 25 are turned downwardly so as to provide an upwardly and outwardly extending recess to engage loops 26 and 21 respectively on the ends of the pumping lines 28 and 29 to which the loops are connected respectively by the connecting links 30 33 and 3|.

Each of the links 30 and 3| have recesses 32 and 33 in their lower edges extending upwardly and toward the frame II. These recesses 32 and 33 thus form hook shaped elements that may be engaged by means of loops 34 and 35 respectively, pivoted to brackets 36 and 31 near the base of the frame I I so that they may be swung up to the position shown in Fig. 3 and engage and hold the links 36 or 3| as shown in full lines in Fig. 3. 40 The lengths of the loops 34 and 35 are such that they engage and hold the links 30 or 3I before the latter have swung to their full position of swing away from the frame I I. As the pendulum continues its swing the hook 24 or 25 passes out of engagement with its respective loop 26 or 21, whereupon the loop 35 drops to the position shown in Fig. 4 out of engagement with the hook 24 or 25 on its return movement. It is, therefore, only necessary to swing the loop 34 or 35 upwardly and hold it until it enters the notch 32 or 33, respectively, in order to disengage either pump line from the pendulum. Either pump line may, therefore, be either disconnected from the pendulum while the latter is swinging and. this may be done without danger of injury to the operator. Suitable handles 38 and 39 may be provided on the loops 34 and 35 respectively to enable them to be lifted into engaging position. Similarly handles 40 and 4| may be provided on the loops 26 and 21. It will be apparent that to reengage the pump lines with the hooks 2425 it is only necessary to lift the respective loop 26 or 21 upwardly into engagement with the respective hook 24 or 25 and hold it until the return swing of the pendulum carries its outer engagement with the holding loop 34 or 35. For example, to the position shown in Fig. 3, it is only necessary to lift the loop 21 upwardly so that it will be engaged by the hook 25 when the latter swings in the direction of the arrow.

It will be understood that various modifications and changes in the form of the apparatus may be made. It is only necessary that the end of the pumping link be engaged and held before the pendulum repeats its outward swing and then be permitted to drop in order to disengage the pumping line. Similarly it is only necessary that the pumping line, or some member of it, be moved upwardly to engage into a recess on to the pendulum as the latter swings in a direction to pull the pumping line and that the holding mechanism thereupon falls or may be moved out of disengaging position.

My invention, therefore, provides a means whereby the pumping line can be readily and easily detached from or attached to a pumping pendulum while the latter is oscillating or in movement.

What I claim is:

1. Pumping apparatus comprising a frame, a pendulum pivotally suspended from the frame, means to oscillate the pendulum, a double hook member secured to and adjacent the bottom of the pendulum, each hook extending on opposite sides of the pendulum in. the direction of oscillation of the pendulum and means to detachably secure a rod line to each of said hook members, said means comprising a connecting link for attachment to each rod line, a loop member pivotally secured to each connecting link and adapted to engage the pendulum hook, and a knock-off means in a position relative to each connecting link to engage the link and to secure the same against further movement before the termination of its oscillation movement away from the said pendulum thereby to release the said loop from engagement with the said hook.

2. Pumping apparatus comprising a frame, a pendulum pivotally suspended from the frame, means to oscillate the pendulum, a double hook member secured to and adjacent the bottom of the pendulum, each hook extending on opposite sides of the pendulum in the direction of oscillation of the pendulum and means to detachably secure a rod line to each of said hook members, said means comprising a connecting link for attachment to each rod line, a loop member pivotally secured to each connecting link and adapted to engage the pendulum hook, and a knock-01f means comprising a loop member pivotally mounted on said frame in a position relative to the oscillation path of said pendulum to be upwardly pivoted into a position adapting the same to engage each said connecting link and to restrain the same against further oscillation movement in a direction away from the pendulum thereby to release the said pivoted loop member from engagement with its pendulum hook.

BENNETT H. RAVANELLI. 

